HP 333A Operating And Service Manual page 5

Model 333A/334A
T A B L E OF CONTENTS
Table o f Contents
Section Page
I
GENERAL INFORMATION
. . . . . . . .
1-3
1.1
.
Description
. . . . . . . . . . . .
1-3
1.6
.
Accessory Features
. . . . . . . .
1-3
1.8
.
Option
. . . . . . . . . . . . . . .
1-3
1.10
.
Instrument Identification
. . . . .
1-3
Section
1 1
INSTALLATION
. . . . . . . . . . . . . .
2
.
1
.
Introduction
. . . . . . . . . . . .
2. 3
.
Inspection
. . . . . . . . . . . . .
2. 5
.
Power Requirements
. . . . . . .
2.7
.
Three-Conductor Power Cable
. .
2
.
10
.
Installation
. . . . . . . . . . . .
2.12
.
Bench Installation
. . . . . . .
2.14
.
Rack Installation
. . . . . . . .
2.16
.
Repackaging For Shipment
. . . .
page
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
Section
-ge
III OPERATINGINSTRUCTIONS
. . . . . .
3-1
3- 1
.
Introduction
. . . . . . . . . . . .
3
.
1
3. 4
.
Controls and Indicators
. . . . . .
3-1
3. 6
.
General Operating Information
.
.
3-1
3. 7
.
Input Connections
. . . . . . .
3-1
3. 9
.
Voltmeter Characteristic$
.
.
3-1
3.12
.
Output Terminals
. . . . . . .
3-2
3.14
.
Operating Procedures.
. . . . . .
3-2
3.15
.
Instrument Turn.On
. . . . . .
3-2
3.16
.
Adjustment of Meter
Mechanical Zero
. . . . . . .
3-2
3.18
.
DistortionMeasurement
. . .
3-2
3.21
.
RF Carriers (334A only)
. . .
3-3
3.22
.
Voltage Measurement
. . . . .
3-3
3.23
.
Meter Indication
. . . . . . .
3-4
3.27
.
Use o f Output Terminals
. . .
3-4
3.30
.
333A1334A with Option 01
. .
3-4
3.32
.
Manual Nulling
. . . . . . . .
3-4
Section Page
IV THEORY OF OPERATION
. . . . . . . .
4-1
4.1
.
Overall Description
. . . . . . . .
4-1
4. 3
.
Block Diagram Description
. . . .
4-1
4. 4
.
Distortion Measuring
4. 8
.
C a r r i e r s .
. . . . . . . . . .
4-1
4.10
.
Voltmeter Operation
. . . . .
4-1
4.12
.
Detailed Circuit Description
. . .
4-1
4.13
.
Impedance Converter Circuit
.
4-1
4.17
.
Rejection Amplifier Circuit
. .
4-2
4.39
.
High Pass Filter
. . . . . . .
4-5
4.41
.
Meter Amplifier
. . . . . . .
4-5
4.49
.
Power Supply Circuit
. . . . .
4-7
4.54
.
RF Detector Circuit (334Aonly) 4-7
Section
Page
5. 1
.
Introduction
. . . . . . . . . . . .
5-1
5. 3
.
Required Test Equipment
. . . . .
5-1
Distortion Measurement of AM
Operation
. . . . . . . . . .
4
.
1
Distortion Measurement in AM
V MAINTENANCE
. . . . . . . . . . . . .
5-1
Section Page
V MAINTENANCE (Cont'd)
. . . . . . . . .
5-1
5. 5
.
Performance Checks
. . . . . . .
5-1
5. 9
.
Fundamental Rejection Check
.
5-1
5.10
.
Second Harmonic Accuracy
. .
5-2
5.11
.
Instrument Induced
Distortion Check
. . . . . . .
5-2
5.12
.
Frequency Calibration Accuracy
Check
. . . . . . . . . . . . .
5-3
5.13
.
Automatic Nulling Mode Check 5-4
5.14
.
Input Impedance Check
. . . .
5-4
5.17
.
Minimum Input Level Check
. .
5-5
5.18
.
DC Isolation Check
. . . . . .
5-5
5.19
.
Voltmeter Accuracy and
Frequency Response Check 5-6
5.20
.
High Pass Filter Check
. . . .
5-7
5.21
.
Residual Noise Check
. . . . .
5-7
5.22
.
AM Detector Check (Model
5.23
.
Adjustment and Calibration
Procedure
. . . . . . . . . . . .
5-8
5.26
.
Adjustments
. . . . . . . . .
5-8
5 . 2 7
.
Voltmeter Gain Adjustments
.
5-8
5.28
.
Voltmeter Frequency Response
Adjustment
. . . . . . . . .
5-10
5.29
.
Bridge Balance Adjustment
. .
5-10
5.30
.
Sensitivity SwitchCalibration
.
5-11
5.31
.
Components
. . . . . . . . .
5-11
334Aonly)
. . . . . . . . . .
5-7
Power Supply and Bias
Adjustment of Factory Selected
5.33
.
Troubleshooting Procedure
. . . .
5-11
5 .38
.
Troubleshooting Voltmeter
Function
. . . . . . . . . . .
5
.
12
5.40
.
Troubleshooting Distortion
Function
. . . . . . . . . . .
5-14
5.45
.
Photoresistor Check and
Adjustment (A6V1 thruA6V5)
.
5-15
5.49
.
Servicing Etched Circuit
Boards
. . . . . . . . . . .
5-16
5.52
.
Servicing Rotary Switches
. . .
5-16
5 -54
*
Converter
. . . . . . . .
5-16
Section Page
VI REPLACEABLE PARTS
. . . . . . . . .
6-1
6.1
.
Introduction
. . . . . . . . . . . .
6-1
6. 4
.
Ordering Information
. . . . . . .
6-1
6. 6
.
Non-Listed Parts
. . . . . . . . .
6-1
Isolating the Impedance
Section Page
M
CIRCUITDIAGRAMS
. . . . . . . . . . .
7-1
7-
1
.
Introduction
. . . . . . . . . . . .
7-1
APpen&
A CODE LIST OF MANUFACTURERS
B SALES AND SERVICE OFFICES
C MANUAL BACKDATING CHANGES
iii